CDX-L250/L430X
SECTION 3
ELECTRICAL ADJUSTMENTS
TEST MODE TUNER SECTION0 dB = 1 ?V
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and AM Auto Scan/Stop Level check can beCautions during repair
performed easier than it in ordinary procedure.
When the tuner unit is defective, replace it by a new one because
its internal block is difficult to repair.
<Set the Test Mode>
1. Turn ON the regulated power supply to ACC and BATT
Note on Adjustmentterminals is OOFF� position (display 1:00).
The adjustments of tuner section, should be performed according
2. Push the preset 4 button.
to the following sequence.3. Push the preset 5 button.
1. FM Auto Scan/Stop Level Adjustment
4. Press the preset 1 button for more than two seconds.
2. FM Stereo Separation Adjustment5. Then the display and LED on the front panel indicates all lights,
3. AM Auto Scan/Stop Level Adjustment
the test mode is set.
FM Auto Scan/Stop Level Adjustment<Release the Test Mode>
1. Push the OFF button.
Setting :
SOURCE button: FM
FREQUENCY SELECT switch (L430X) : FM 50k
FM RF signal
generator
antenna
terminal
0.01 ?F
set
Carrier frequency : 97.9 MHz (L250)
: 98.0 MHz (L430X)
Output level: 22 dB (12.6 ?V)
Mode: mono
Modulation: 1 kHz, 22.5 kHz deviation (30%)
Procedure :
1. Set to the test mode.
2. Push the SRC button and set to FM.
Display
1
FM97.90l Z
STSHUF
3. Adjust with the volume RV2 on TU601 so that the OFM�
indication turns to OFM0� indication on the display window.
But, in case of already indicated OFM0�, turn the RV2 so that
put out light O0� indication and adjustment.
Display
1
FM0Z97.90l Z
STSHUF
*1: L430X are indicates O98.00�.
Adjustment Location : See page 16.
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ACEC
